/Engine/Source/Runtime/Engine/Classes/Particles/ParticleSystemComponent.h
Set a named actor instance parameter on this ParticleSystemComponent. Updates the parameter if it already exists, or creates a new entry if not.
virtual void SetActorParameter ( [FName](API\Runtime\Core\UObject\FName) ParameterName, class [AActor](API\Runtime\Engine\GameFramework\AActor) * Param )